User`s guide

50
Operation
Using the Mixers with MMS Analyzers
CONV LOSS
(conversion loss) Offsets the reference level to compensate for amplitude losses at the active input port.
If necessary, use
select input to activate the desired input port before specifying its
conversion-loss offset.
To clear the offset, enter a conversion loss of zero.
After the instrument preset, a default value of 30 dB is activated automatically for the
input port of the external-mixer-interface module.
Preset Input Sets which active input port will be selected when the INSTR PRESET is pressed. The
preset input softkey can be accessed by pressing
State, then MORE.
INSTR PRESET Resets to the preset input and to the lowest full frequency range available. (For an
external mixer, this is band A.) This is a front panel key.
SIGNAL IDENT
(signal identify) Press
Frequency, More, sig id options.
Executes a routine to identify real, in-band signals using either the image (default) or
shift methods.
Several options are available under
sig id options:
-
SIG ID ⇒ CF Places the marker on the identified real signal and centers the signal
on the display.
-
SIG ID MAN OFF Selects manual or automatic (default) mode.
-
IMAGE/SHIFT Selects the routine to use for identification.
-
SIG ID AMPTD Δ Specifies the amplitude difference between the marked signal and
signals tested as images or harmonics (default is 10 dB; applies
only to IMAGE mode.)
-
IMAGE N START Determines the frequency range for possible image or harmonic
responses by selecting the lowest and highest local oscillator
harmonic used for mixing, according to the tuning equation below:
F
s
= N x F
LO
± IF
Default is 1.
-
IMAGE N STOP See “IMAGE N START” definition above.
Default is 40.